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deb12d78eb
With the kitty keyboard protocol active, these function keys were not
recognized:
- F1, F2 and F4 arrive as `CSI P`/`Q`/`S`, or as `CSI 1;<mod> P/Q/S`.
- Any F-key pressed with a modifier, e.g. `CSI 15;5~` for Ctrl+F5.
`matchesKey` returned false whenever a modifier was set and only
compared against the legacy sequences. `parseKittySequence` did not know
any F-key forms. So shortcuts bound to keys like `f1` or `ctrl+f5` never
fired.
Separately, F13–F35 (and other kitty functional keys) arrive as CSI-u
codepoints in the Private Use Area. `decodeKittyPrintable` returned them
as text, so the editor inserted invisible U+E020+ characters into the
prompt.
Changes in `packages/tui/src/keys.ts`:
- Add F1–F12 internal codepoints. Map `~` numbers 11–15, 17–21, 23 and
24 to them.
- Parse the `CSI [1;mod[:event]] P/Q/S` form. F3 is left out because
`CSI 1;<n>R` collides with cursor position reports, so kitty sends F3 as
`CSI 13~`.
- Let the `f1`…`f12` cases in `matchesKey` fall back to
`matchesKittySequence` so modifiers work. Name the keys in `parseKey`
output.
- Make `isKeyRelease` and `isKeyRepeat` recognize `:3`/`:2` events on
P/Q/S, so F1/F2/F4 releases don't trigger shortcuts a second time.
- `decodeKittyPrintable` now rejects the kitty functional-key PUA range
(57344–63743). Keypad keys are normalized to ASCII first, so they still
decode.
Testing:
- Added tests in `packages/tui/test/keys.test.ts`. They cover kitty
F1–F12 with and without modifiers, F3 not being confused with a cursor
position report, release and repeat detection, and F13+ not decoding as
text. Two of the new tests fail without the change; all pass with it.
- Ran `npm test` in `packages/tui` and `npm run check`; both pass.
- Before the change: `parseKey("\x1b[P")` and `parseKey("\x1b[1;5P")`
returned `undefined`, `matchesKey("\x1b[15;5~", "ctrl+f5")` returned
false, and `decodePrintableKey("\x1b[57376u")` returned `"\ue020"`.
- After the change: these give `f1`, `ctrl+f1`, true and `undefined`.
Fixes #11419
Fixes #11345
Requested by @badlogic
Co-authored-by: triagent <triagent@localhost>
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